Yes, PGDM is really a very good option to go with. And if you think it's PGDM in Agricultural Biotechnology then definitely it's a wise choice. Since you have completed graduation in biotechnology I would suggest you if you really wish to explore your potential more in future then go for M.Sc in Biotechnology courses. You can get vast career opportunities after that. This PGDM courses are also good though for different colleges the eligibility criteria is different. So think of it and make your choice!! Here is an option for you

https://www.careers360.com/colleges/ramakrishna-mission-vivekananda-centenary-college-kolkata/post-graduate-diploma-in-agriculture-biotechnology-course